add infer aishell1 subtest demo in paraformer-large-contextual

lzr265946

2023-02-15 d2755f476872da773b816b3952acef97e1ee9336

1
2
3
4
5
6
7
8
+    plus
-    minus
/    divided
÷    divided
:    divided
×    times
*    times
·    times